Impedance-injection module using transformer core with multiple secondary windings for dynamic line balancing of a high voltage transmission line

EP3387728B1Active Publication Date: 2026-01-21SMART WIRES INC
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Patent Information

Application Number
EP2016873565
Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2016-03-14
Filing Date
2016-11-16
Publication Date
2026-01-21
Estimated Expiration
2036-11-16

AI Technical Summary

Technical Problem

Existing high-voltage transmission line control systems face challenges in achieving dynamic line balancing with distributed active impedance-injection modules due to high cost, reliability issues, and the need for specialized components that are not cost-effective or reliable enough for widespread utility acceptance.

Method used

The use of a plurality of secondary windings with individual voltage converters to generate and inject the required inductive or capacitive impedances directly on high-voltage transmission lines, utilizing off-the-shelf power-electronic components and a distributed approach to ensure high reliability and lower manufacturing costs.

Benefits of technology

This solution provides a cost-effective, highly reliable, and efficient method for dynamic line balancing by using multiple secondary windings to inject the necessary impedances, reducing the stress on components and ensuring system reliability, thus improving power grid efficiency and reducing failures.

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Abstract

This patent discloses an active impedance-injection module for dynamic line balancing of a high-voltage (HV) transmission line. The impedance-injection module comprises a plurality of transformers each having a primary winding in series with a HV transmission line. Each transformer also has secondary windings, each connected to an individual electronic converter. The plurality of secondary windings are electrically isolated from the associated primary winding and extract power from the HV transmission line for operation of the converters and other circuits connected to the secondary windings. The active impedance-injection module is enabled to generate a controlled impedance, inductive or capacitive, to be impressed on the HV transmission line. A plurality of active impedance-injection modules spatially distributed on a HV transmission line are enabled to inject a controlled cumulative impedance on a HV transmission line while limiting the capacity of individual converters to that achievable with practical electronic components.
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Citation Information

Patent Citations

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